Theodore a



' fi iimses:

(No Model.)

T. A. WALTHE'R.

COMBINED MOTOR AND PUMP.

PatentedApr. 30, 1895.

rm: unnmsyptzks co" PHOTO-H1140 WASHINGTON n c NITED STATES PATENT THEODORE A. \VALTHER, OF CHICAGO, ILLINOIS, ASSIGNOR OF TlVO-FIFTHS TO CHARLES TURNER BROWN, OF SAME PLACE.

COMBINED-MOTOR AND PUMP.

SPECIFICATION forming part of Letters Patent No. 538,633, dated April 30, 1895.

Application filed July 31, 1894.

To all whom, it may concern:

Be it known that I, THEODORE A. WALTHER, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements ina Combined Motor. and Pump, of which the following, when taken in connection with the drawings accompanying and forming a part hereof, is a full and complete description, sufficient to enable to those skilled in the art to which it pertains to understand, make, and use the same.

This invention relates to machines designed to be actuated by a supply, under pressure of motive fluid, preferably water, whereby the motor of the machine is automatically started and stopped to force through the pump of the machine fluid, either gaseous or liquid, to a given pressure, and there maintained; and the object of this invention is to obtain a ma- 2o chine of the character named wherein the motive fluid used to actuate the motor forming apart thereof shall be economically used, the piston of such motor shall move uniformly its full travel in the cylinder thereof, and

shall reverse at each end of its strokein substantially equal time, and a machine which shall be simple in construction and not liable to get out of order.

In the drawings referred to as forming a part of this specification, Figurel isafront elevation of a combined motor and pump embodying my invention; Fig. 2, a vertical sectional view thereof; and Fig. 3, a vertical sectional view, on an enlarged scale, of the slide- 5 valve of the motor of the machine, and'of the cylinder and piston whereby the position of the slide-valve is determined and controlled.

A reference letter applied to designate a given part is used to indicate such part in all 0 the figures of the drawings wherever the same appears.

A is the motor cylinder.

Bis the pump cylinder.

C is a piston rod common to cylinders A and B.

a is the piston-head on piston rod C in cylinder A. There is also a piston-head on such piston rod in cylinder B.

a b are stuffing-boxes through which piston rod 0 extends.

The motor of my combined motorand pump Serial No. 519,072. (No man.)

is constructed with special reference to being actuated by water under pressure, and hence, although I do not confine myself to the use of Water as motive fluid, I shall hereinafter assume that water will be used for such purpose.

D is a supply pipe extending from a suitable water supply to chest E.

c is a slide-valve in chest E, by which water is directed alternately through passage-ways F, G, to the two sides of piston-head a, and to waste pipe H. I is a three-way cock. in motor cylinder A. The piston rod 0 is hollow and J is a rod extending from arm I of three-way cock I into piston rod C. J is a sleeve forming a shoulder on rod J adapted to engage with shoulder (3' on piston rod 0. As piston rod C moves from end to end of cylinder A, the position of three-way cock I is thus thereby determined.

K'is a waste-pipe from the three-way cock I and L is a supply pipe extending from chest E to three-way cock I, and Z is a pipe adapted to serve as a supply or waste pipe extending from the three-way cock I to part III of cylinder M m.

M is a piston rod, having passage-way m therethrough, in cylinder M m. Piston rod M extends through the head of cylinder M on, through the casing of chest E and is attached to valve e. N is a piston-head secured on piston rod M in part M, of cylinder M m, and n is a piston-head of different area secured on such piston rod M in partm of cylinder M m.

In order to obtain uniform reversing action of piston rod C, I have found that the area of piston-head N should be substantially twice the area of piston-head n.

The position of the slide-valve 6 determines, in the ordinary way, to which end of the cylinder A motive fluid (preferably water) shall be directed, and from which end it shall be exhausted; and the position of the slide valve 6 is determined and controlled by the piston rod M as such piston rod is moved in unison with the movement of the three-Way cock I, in the manner hereinafter described.

The operation of the motor isz-Assumiug slide-valve c to be in the lower of the two positions in which it can be placed by piston rod M, the motive fluid in chestE will then extend therefrom through passageway F to the upper end of cylinder A, and above piston-head a. Such piston-head will be thereby forced down. At the same time the motive fluid in cylinder A at the other end thereof can and will extend through passage-way G to valve e through such valve'and to waste through waste-pipe H. At the same time, motive fluid will extend from chest E through pipe L to and through the three-way cock I and through pipe Z to part M of cylinder M an, and such motive fluid will also extend through passageway m in piston rod M to part mot cylirr der M m. The pressure of the motive fluid on piston-head N in part M of cylinder M m will tend toforce such piston-head, and the piston rod M on which it is secured, downward, (that is, maintain valve e in the position thereofassumed,) while the pressure of the motive fluid on piston-head nwill tend to force such piston-head and piston rod M on which it, in common with piston-head N, is secured, upward. As the piston-head N is, as hereinbefore stated, of double the area of piston'head n, so long as the pressure of motive fluid is maintained on both pistonheads N n, the piston rod M will remain in the position assumed. When piston a descends sufficiently to turn the three-way cock I (by means of connecting-rod J or its equivalent) so that the motive fluid in part M of cylinder M m can run to waste through pipe Z,three-way cock I and waste pipe K, pressure on piston-head N is thereby relieved and pressure on pistonhead at continuing such piston-head and piston rod M will be movedupward, there to remain until the piston rod 0 in its upward movement consequent on the change in position of valve E, again moves three-way cock I so that motive fluid is again admittedto part M of cylinder M m. hen mbtive fluid is thusagain admitted to part M of cylinder M on the piston-head N will force piston rod M and piston-head n thereon down, and the motive fluid in part m of cylinder M m will return through passage-way m in piston rod M to chest E. y i i The pump part of my combined motor and pump contains no peculiarfeat u res requiring special explanation or description and may be used for forcing either air orwater into any receptacle with which it is suitably connected.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination in a combined motor and pump of a motor cylinder, a piston rod common to the motor and pump-cylinders, a piston-head in the motor cylinder and a piston-headin the pump-cylinder, both of such piston-heads secured on the piston rod, a supply and waste-valve within the motor-cylim der, a connection between the piston rod and the valve whereby the position of the valve is determined by the piston rod, a motivefiuid chest, a valve in such chest controlling the inlet and exhajust'ports of the motor cylinder an auxiliary cylinder of two diameters, a hollow piston rod in the cylinder extending into the motivefluid chest and connected to the valve in such motive-fluid chest pistonheads of different area secured to the hollow piston rod, a passage-waycommunicatin g with and extending from the larger end of the auxiliary cylinder to the valve within the motor cylinder, and a Waste-pipe extending from such valve; substantially as described 2. The combination of a" motor-eylinder, a motive fiuid-chest, passage-waystherefroin to theends of the motor-eylinde'r, a valve inthe motive fluid-chest controlling by its position the movement of motive-fluid into and out of the motor-cylinder, an auxiliary cylinder of two diameters, a hollow piston rod in the auxiliary cylinder extendingtherefro n into the motive fluid ciie'st, and connected tothe valve threimpiston-heads of differerit diameter on the hollowpiston rod, whereby motive-flnid is atall times in the use of the motor present in the smaller part of the auxiliarycylindcr, and a passage-way extending into the part of such auxiliary cylinder ot larger diameter, avalve in such passage-way and mechanis m eonneeted to such valve and the piston rodin the motorcylinder whereby the position of such valve and the consequent admission of motive fluid to or exhaust thereof from the end of the auxiliary cylinder having the larger diameter is controlled by the piston rod in the motor-cylinder; substantially asdescribed,

3. The combination of a motive fluid-chest, a valve therein, whereby motiveiiuid is directed into the motor-cylinder and to waste, an auxiliary cylinder of two diameters, a hollow piston rod in the cylinder extending therefrom into the motive fluid-chest and communicating therewith so that motive-fluid may extend through the hollow piston rod to the smaller end of the auxiliary cylinder, aconnection between the hollow-piston rod and the valve, piston-heads of different diameter on the hollow piston rod in the auxiliary cylinder, a passage-way frem the m o'tivefluidsup ply into the largen end of the auxiliary cylinder, a valveinterposed in such passage-way whereby motive fluid is directed into such auxiliary cylinder and to waste therefrom, and a connection between such valve and the piston rod of the motor cylinder; substantially as described.

THEODORE A. NVALIIIER. Vitnesses:

FLORA L. BRO N, CHARLES TURNER BROWN. 

